90 research outputs found
Selection rules at the quark-antiquark vertex of the QCD Pomeron
We derive the full analytic expression for the QCD eikonal coupling of a
quark-antiquark state to the exchanged gluon-gluon state in the BFKL formalism.
The formula is valid for all conformal spin configurations of the
quark-antiquark and gluon-gluon states. In particular, a new selection rule on
conformal spins characterizes the non-dominant BFKL components with intercept
below the Pomeron in the conformal-invariant framework.Comment: 12 pages, latex with tcilatex, no figur
Survival probability in diffractive Higgs production in high density QCD
In this paper, the contribution of hard processes described by the BFKL
pomeron exchange, is taken into account by calculating the first enhanced
diagram. The survival probability is estimated, using the ratio of the first
enhanced diagram and the single pomeron amplitude, taking into account all
essential pomeron loop diagrams in the toy model of Mueller. The triple pomeron
vertex is calculated explicitly in the momentum representation. This
calculation is used for estimating the survival probability, It turns out that
the survival probability is small, at . Hard pomeron re-scattering
processes contribute substantially to the survival probability.Comment: 28 pages, 7 figure
On Certain Two Dimensional Integrals that Appear In Conformal Field Theory
In a first part, we generalize a theorem for an holomorphic
anti-holomorphic integrand, in the case of 2 dimensional Fourier transform. In
the second part, we derive p-uple conformal integrals the integrand of which
are linear combination of holomorphic times holomorphic generalized
hypergeometric functions. The specific case is relevant to determine the
triple Pomeron vertex in QCD.Comment: latex txt.tex, 3 files, 39 pages [SPhT-T00/034], submitted to Comm.
Math. Phy
- …